SINGAPORE - Investigations into the fish die-off and pinkish-purple colour of the Sentosa South Cove waterway earlier this month have found that it was caused by the recent weeks' heavy and persistent rainfall that altered water conditions.
Water samples tested had low levels of salinity and dissolved oxygen, which may have led to the dead fish sighted on the waterway banks from Jan 6 to Jan 9, said the Sentosa Development Corporation (SDC) and National Environment Agency (NEA) in a joint statement on Sunday (Jan 17).
The algal bloom that changed the colour of the waters was likely triggered by a high nutrient level and organic content in the water, NEA added.